CN112974529A - Coiling method for preventing surface scratch of ultrathin soft-state bright-surface low-roughness stainless steel strip - Google Patents
Coiling method for preventing surface scratch of ultrathin soft-state bright-surface low-roughness stainless steel strip Download PDFInfo
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 39
- 239000010935 stainless steel Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 82
- 239000010959 steel Substances 0.000 claims abstract description 82
- 239000011888 foil Substances 0.000 claims abstract description 23
- 230000008569 process Effects 0.000 claims abstract description 14
- 238000004804 winding Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 3
- 230000003449 preventive effect Effects 0.000 claims 1
- 238000010008 shearing Methods 0.000 abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 5
- 230000003746 surface roughness Effects 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000007373 indentation Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0057—Coiling the rolled product
Abstract
The invention provides a steel belt sorting method for preventing surface scratches, which comprises the following steps: (1) selecting 316L precision stainless steel foil with the width of more than 500mm and the thickness of less than 0.1mm as a raw steel coil; (2) setting a tension pad consisting of felt and flannelette on the raw steel coil; (3) and controlling the coiling tension in the running process of the raw steel coil. The method provided by the invention is used for shearing the precision stainless steel foil with the soft bright surface and the low roughness on the surface, can realize good surface quality and practical shearing edge of the steel foil, is suitable for industrial mass production, and meets the high-quality requirement of the precision stainless steel foil in high-end industry.
Description
Technical Field
The present invention generally relates to the field of steel rolling technology. More particularly, the invention relates to the field of stainless steel shearing, in particular to a shearing process of an extremely thin precise stainless steel strip, and particularly relates to a shearing process of a precise stainless steel foil with a width of more than 500mm and a thickness of less than 0.1mm, and a soft bright surface and low roughness.
Background
The ultrathin precise stainless steel band enters the fields of hydrogen energy batteries, communication semiconductors, computer products and the like at present, has very high added value, and also puts higher requirements on the metal characteristics and the surface quality of the stainless steel. Particularly, the width is more than 500mm, the thickness is less than 0.1mm, the surface is a soft bright surface low-roughness precision stainless steel foil product, the conventional production process can cause the surface to have continuous scratch defects, and the use of the product can be influenced.
At present, no batch shearing technology aiming at the precision stainless steel foil products exists, so that the great demands of the products on the market cannot be effectively met.
Disclosure of Invention
In order to solve part or all of the technical problems, the invention provides a strip coiling method for preventing surface scratches of an extremely thin soft-state bright-surface low-roughness stainless steel strip.
The technical scheme of the invention is as follows:
a steel strip separation method for preventing surface scratches comprises the following steps:
(1) selecting 316L precision stainless steel foil with the width of more than 500mm and the thickness of less than 0.1mm as a raw steel coil;
(2) setting a tension pad consisting of felt and flannelette on the raw steel coil;
(3) and controlling the coiling tension in the running process of the raw steel coil.
Optionally, the surface finish of the raw steel coil is BA.
Optionally, in the step (2), the surface of the flannelette is smooth.
Optionally, in the step (2), an anti-slip rod is additionally arranged on the flannelette.
Alternatively, in step (3), the initially set unwinding tension and winding tension are maintained while the running of the raw steel coil does not exceed 200 m.
Optionally, in step (3), when the running of the raw steel coil is greater than 200m, the winding tension is decreased by 28%.
Compared with the prior art, the strip coiling method for preventing surface scratches of the ultrathin soft-state bright-surface low-roughness stainless steel strip has at least the following beneficial effects:
the strip coiling method for preventing surface scratches of the ultrathin soft-state bright-surface low-roughness stainless steel strip realizes shearing production of the soft-state bright-surface low-roughness precision stainless steel foil with the surface with the width of more than 500mm and the thickness of less than 0.1mm, has good surface quality and practical shearing edge part of the steel foil, is suitable for industrialized mass production, and meets the high-quality requirement of the high-end industry of the precision stainless steel foil.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. In the drawings:
fig. 1 shows the manner in which the tension pad is set.
FIG. 2 is a schematic diagram of a process flow of a B + S slitting machine set.
Detailed Description
The present invention will be described in detail with reference to the following embodiments in order to fully understand the objects, features and effects of the invention, but the present invention is not limited thereto. The process of the present invention employs conventional methods or apparatus in the art, except as described below.
For the extremely thin precise stainless steel strip mainly applied to the hydrogen energy battery component, the requirement on the surface quality in the shearing process is extremely high. However, the existing method easily causes the surface of the extremely thin and precise stainless steel belt to have continuous scratch defects, and the use of the product is influenced.
In view of the above problems, the inventors of the present invention have conducted intensive studies to improve the aspects of material selection, tension pad setting, tension control, etc., thereby creatively providing a steel strip separation method for preventing surface scratches.
The method is specially provided for a precise stainless steel foil with the grade of 316L, wherein the stainless steel foil with the grade of 316L comprises the following components in percentage by weight: less than or equal to 0.08 percent of C, less than or equal to 1.00 percent of Si, less than or equal to 2.00 percent of Mn, less than or equal to 0.045 percent of P, less than or equal to 0.03 percent of S, 10.00 to 14.00 percent of Ni, 16.00 to 18.00 percent of Cr, 2.0 to 3.0 percent of Mo, and the balance of iron and inevitable impurities.
The "precision stainless steel strip" is a thin cold-rolled stainless steel strip, and the thickness thereof is usually 0.05 to 0.3 mm. The precision stainless steel foil refers to a cold-rolled stainless steel foil with the thickness less than or equal to 0.1 mm. The "soft bright surface low roughness stainless steel strip" means hardness: HV is less than or equal to 170, surface finish is BA, surface roughness is: the Ra is less than or equal to 0.2 mu m, and the elongation is more than or equal to 50 percent.
The invention discloses a strip coiling method for preventing surface scratches of an extremely thin soft-state bright-surface low-roughness stainless steel strip, which specifically comprises the following steps:
(1) sorting
Through the shearing characteristics and representative component analysis of different materials, a 316L precision stainless steel foil with the width of more than 500mm and the thickness of less than 0.1mm is selected as a raw material steel coil.
The surface finish of the precision stainless steel foil is BA. By "BA" is meant the finish grade of the stainless steel surface, BA corresponding to the stainless steel surface being matte.
(2) Tension pad setting
A tension pad consisting of felt and flannelette is arranged on the raw steel coil, and the tension pad is used for tension generation control in a combined mode of the felt and the flannelette.
The specific setting of the tension pad is shown in fig. 1.
The original tension pad is attached with a felt, and the soft bright surface low-roughness stainless steel band has low surface roughness, so the tension pad can be scratched when passing through the felt. The felt and the flannelette are combined in a mode that a layer of flannelette wraps the outside of the felt, so that the roughness of the felt is reduced, and the felt does not scratch a steel belt.
The generation of scratches can be effectively reduced by adopting the flannelette, so that the use is convenient, and a large amount of cost can be saved; in the process of slitting the surface of the steel strip, the velvet fabric is adopted as a contact surface for replacing the contact of a common felt for the mark, the surface friction resistance can be greatly reduced, and meanwhile, the surface flexibility of the velvet fabric does not cause scratch defects on the surface of the steel strip, so that the stable shearing of a precise stainless steel foil with the width of more than 500mm and the thickness of less than 0.1mm is realized, the surface quality of the steel strip is good, and the requirement of high quality is met.
Further, through continuous groping and research, optimize to tension pad felt (flannelette), firstly change the flannelette surface into the plain noodles by the matte, the difficult gathering of steel band surface debris of operation like this avoids the fish tail. And secondly, the anti-slip rod is additionally arranged on the flannelette, so that the stress area of the flannelette is increased, and the movement of the flannelette during high-speed operation is avoided. The surface scratch defect is greatly improved, the running speed is increased from 15m/min to 150m/min, the production speed is increased by nearly 10 times, the method is suitable for industrial mass production, and the high-quality requirement of the high-end industry of the precision stainless steel foil is met.
The antiskid rod is a common steel pipe with the diameter of 30mm, the head of one end of the flannelette is coiled on the steel pipe and fixed, the steel pipe is fixed on the frame at the inlet of the upper tension pad, and the other end of the flannelette is flatly laid under the tension pad.
By means of the arrangement, the plate shape of the coiled material can be ensured to be good, and the plate shape fluctuation in the shearing and coiling process is reduced.
(3) Coiling tension control
And controlling the coiling tension in the running process of the raw steel coil.
Specifically, when the steel coil runs for no more than 200m, the initially set uncoiling and coiling tensions are maintained; when the steel coil runs for more than 200m, the coiling tension is reduced progressively according to the reduction of 28%.
The tension decreasing mode is as follows:
winding tension is set as the set tension 200m before winding;
coiling is more than 200m, and coiling tension is linearly decreased according to 28% of set tension;
a decreasing formula:
the running length refers to the actual running length of the raw material steel coil, is less than or equal to the coil length, and is measured in meters.
(4) Slitting
And slitting according to the required size.
In a preferred embodiment, the above process is carried out using a german B + S slitting apparatus. FIG. 2 is a schematic diagram of a process flow of a B + S slitting machine set. The tension system mainly comprises a tension pad felt and a guide roller, and the unique longitudinal cutting tension pad control shearing and coiling tension system can ensure that the plate shape of the coiled material is good and reduce plate shape fluctuation in the shearing and coiling process.
Examples
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention. The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions.
Example 1
(1) A316L precision stainless steel foil with the width of 500mm, the thickness of 0.1mm and the surface smoothness of BA is selected as a raw steel coil.
(2) The raw steel coil was loaded onto a german B + S slitter. A tension pad consisting of felt and flannelette is arranged on the raw steel coil, the surface of the flannelette is a smooth surface, and an anti-skid rod is additionally arranged. The felt and the flannelette are combined in a mode that a layer of flannelette wraps the outside of the felt, so that the roughness of the felt is reduced, and the felt does not scratch a steel belt. The antiskid rod is a common steel pipe with the diameter of 30mm, the head of one end of the flannelette is coiled on the steel pipe and fixed, the steel pipe is fixed on the frame at the inlet of the upper tension pad, and the other end of the flannelette is flatly laid under the tension pad.
(3) Running the raw steel coil on a slitter, and keeping the initially set uncoiling tension of 30N/mm when the running of the raw steel coil does not exceed 200m2And a take-up tension of 30N/mm2. When the running of the raw steel coil is more than 200m, the coiling tension is reduced progressively according to the reduction amplitude of 28%. The running speed of the raw steel coil is set to be 150 m/min.
(4) The raw steel coil was slit into strips of 165mm in size.
(5) And (3) detecting the surface quality of the sheared steel strip:
surface of the steel strip: no scratch, no short scratch, no indentation, surface finish BA, surface roughness Ra: 0.18 μm;
shearing edge waves: 0.9mm, side bend: 0.48 mm;
and (3) cutting burrs: less than 5% of the thickness of the material.
Example 2
(1) A316L precision stainless steel foil with the width of 550mm, the thickness of 0.08mm and the surface smoothness of BA is selected as a raw steel coil.
(2) The raw steel coil was loaded onto a german B + S slitter. A tension pad consisting of felt and flannelette is arranged on the raw steel coil, the surface of the flannelette is a smooth surface, and an anti-skid rod is additionally arranged. The felt and the flannelette are combined in a mode that a layer of flannelette wraps the outside of the felt, so that the roughness of the felt is reduced, and the felt does not scratch a steel belt. The antiskid rod is a common steel pipe with the diameter of 30mm, the head of one end of the flannelette is coiled on the steel pipe and fixed, the steel pipe is fixed on the frame at the inlet of the upper tension pad, and the other end of the flannelette is flatly laid under the tension pad.
(3) Running the raw steel coil on a slitter, and keeping the initially set uncoiling tension of 35N/mm when the running of the raw steel coil does not exceed 200m2And a take-up tension of 35N/mm2. When the running of the raw steel coil is more than 200m, the coiling tension is reduced progressively according to the reduction amplitude of 28%. The running speed of the raw steel coil is set to be 160 m/min.
(4) The raw steel coil was slit into strips of 150mm in size.
(5) And (3) detecting the surface quality of the sheared steel strip:
surface of the steel strip: no scratch, no short scratch, no indentation, surface finish BA, surface roughness Ra: 0.2 μm;
shearing edge waves: 0.85mm, and the side bending degree of the edge part is 0.45 mm;
and (3) cutting burrs: less than 5% of the thickness of the material.
Example 3
(1) 316L precision stainless steel foil with the width of 580mm, the thickness of 0.06mm and the surface smoothness of BA is selected as the raw steel coil.
(2) The raw steel coil was loaded onto a german B + S slitter. A tension pad consisting of felt and flannelette is arranged on the raw steel coil, the surface of the flannelette is a smooth surface, and an anti-skid rod is additionally arranged. The felt and the flannelette are combined in a mode that a layer of flannelette wraps the outside of the felt, so that the roughness of the felt is reduced, and the felt does not scratch a steel belt. The antiskid rod is a common steel pipe with the diameter of 30mm, the head of one end of the flannelette is coiled on the steel pipe and fixed, the steel pipe is fixed on the frame at the inlet of the upper tension pad, and the other end of the flannelette is flatly laid under the tension pad.
(3) Running the raw steel coil on a slitting machine, and keeping the initially set uncoiling tension of 28N/mm when the running of the raw steel coil does not exceed 200m2And a take-up tension of 28N/mm2. When the running of the raw steel coil is more than 200m, the coiling tension is reduced progressively according to the reduction amplitude of 28%. The running speed of the raw steel coil is set to be 180 m/min.
(4) And longitudinally cutting the raw steel coil into strips with the size of 180 mm.
(5) And (3) detecting the surface quality of the sheared steel strip:
surface of the steel strip: no scratch, no short scratch, no indentation, surface finish BA, surface roughness Ra: 0.2 μm;
shearing edge waves: 0.9mm, 0.46mm of side bending degree of the edge part;
and (3) cutting burrs: less than 5% of the thickness of the material.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other substitutions, modifications, combinations, changes, simplifications, etc., which are made without departing from the spirit and principle of the present invention, should be construed as equivalents and included in the protection scope of the present invention.
Claims (6)
1. A steel strip separating method for preventing surface scratches is characterized by comprising the following steps:
(1) selecting a 316L precision stainless steel foil with the width of more than 500mm and the thickness of less than 0.1mm as a raw steel coil;
(2) setting a tension pad consisting of felt and flannelette on the raw steel coil;
(3) and controlling the coiling tension in the running process of the raw steel coil.
2. The method for separating steel strip for preventing surface scratches as defined in claim 1, wherein the surface finish of said raw steel coil is BA.
3. The method for separating a steel strip for preventing surface scratches as recited in claim 1, wherein in the step (2), the surface of the flannelette is smooth.
4. The method for separating steel strip with surface scratch preventive function according to claim 1, wherein in the step (2), the flannelette is additionally provided with an anti-slip rod.
5. The method of claim 1, wherein the initially set unwinding tension and winding tension are maintained in the step (3) when the running of the raw steel coil does not exceed 200 m.
6. The method for separating a steel strip for preventing surface scratches as recited in claim 1, wherein in the step (3), the decrease of the winding tension is performed in accordance with a 28% decrease when the running of the raw material steel coil is greater than 200 m.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113896026A (en) * | 2021-09-28 | 2022-01-07 | 内蒙古联晟新能源材料有限公司 | Improvement method for finishing and trimming double-zero foil material |
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